TTL-BL is designed for when the background is brighter than subject, ie. outdoor settings. For indoor photos, especially in clubs where the lighting is unpredictable, do you think it'd be better to stick to TTL? This seems like a good comparison on how each method works, but I'm still somewhat confused. I'm thinking TTL is better in crazy lighting situation because it'll lend me a bit more predictability. Anybody here have experience with this? Thanks in advance.